At a shop rumored to have the 'dirt scrubbing' menu with in-shot service, I ran into my sister! She has skin that sucks you in and is well-endowed—Runa-chan. Even though she was incredibly flustered, I calmed down a bit when she said, 'Just stay quiet.' After that, it was free rein; she just let it happen... From missionary to cowgirl, then doggy style, and of course, in the end, it was an in-shot. Taking advantage of her weakness, I did whatever I wanted.
